5 of Last Week's Biggest Losers

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Audience was the market's biggest loser, shedding nearly two-thirds of its value after revealing that the audio-signal processor specialist's technology may not be available in the upcoming iPhone 5. The drop may seem severe, but it's more a reaction to Audience's ability to license its technology in the future than the licensing revenue that it will have to live without.

Kindle Fires weren't the only tablets getting cheaper this week. LeapFrog lowered the price of its LeapPad1 by $20 to $79.99. The learning toy was one of last holiday season's biggest winners, but investors don't usually warm up to margin-stinging price cuts.

Pandora slipped after a report revealed that iTunes was working on a rival service that would be made available for iOS, Mac, and Windows devices. It may be a bit of an overreaction given the fact that many other companies have rolled out similar custom streaming platforms, but iTunes remains the top dog in digital music.

Finally, Sigma Designs may have posted a narrower quarterly loss than the market was expecting, but BWS Financial still downgraded the chip maker after the report.